Cthulu, the Slumbering One

Madness 5 (When a player receives 10 Madness
counters they lose the game)

Flying, ward {7}, wither, annihilator 3

Non-creature spells cost {3} less to cast

{1}{u}{b}: Target creature becomes a 0/1 Human

When Cthulu dies, return it to it's owners hand at
the beginning of the next end step.